I've been to Placencia Village, Belize, so I can give you an opinion on that. I spent a couple of weeks diving with Splash Dive Center and had a great time, some great dives. We did make a trip to the Blue Hole, but from Placencia Village it's a long boat ride ride(about 4 hours if I remember correctly) and it's a deep dive (around 130fsw) to see the stalactites or stalagmites so it's a short dive unless you're doing decompression diving. The dives around Placencia Village were much better, especially Glover's Reef. For non-divers, there's some tours to nearby Mayan ruins and some zipline stuff in the jungle. The dive center included some of those in some of its packages if a person so desired. I was strictly in it for the diving though. I loved the dive shop, Splash Dive Center, in Placencia Village. Very friendly and accommodating. I'm pretty sure they could arrange those sort of tours for a non-diver without any problem. Placencia Village itself is small, and can be covered in most of a day. I found the people to be friendly and helpful enough. Some decent places to eat, a little shopping, a couple of bars I really liked (Pickled Parrot and especially Barefoot Bar, place really hops at night). It can get a bit crowded during high season, and my vacation spanned the start of that by a few days, and I did get treated to the spectacle of some pretty drunk and obnoxious rich brats running around, but they were the only unpleasant characters I encountered.
